//Allows a customer to delete a dishe from the cart. If there is multiple times the same dish, quantity will be decremented.
public IActionResult DeleteItem(int idDish)
{
DishesManager dManager = new DishesManager(Configuration);
int price = dManager.GetDishePrice(idDish);
HttpContext.Session.SetInt32("TotalAmount", (int)HttpContext.Session.GetInt32("TotalAmount") - price);
List <Item> cart = SessionHelper.GetObjectFromJson <List <Item> >(HttpContext.Session, "cart");
var itemToRemove = cart.Single(d => d.Dishe.idDishes == idDish);
//In case of the element the customer wants to delete is the last one, we empty the session.
if (cart.Count == 1)
{
SessionHelper.SetObjectAsJson(HttpContext.Session, "cart", null);
}
//If the item has more than 1 quantity, we just decrement it but do not delete the entire
else if (itemToRemove.Quantity > 1)
{
cart.Remove(itemToRemove);
itemToRemove.Quantity--;
cart.Add(itemToRemove);
SessionHelper.SetObjectAsJson(HttpContext.Session, "cart", cart);
}
else
{
cart.Remove(itemToRemove);
SessionHelper.SetObjectAsJson(HttpContext.Session, "cart", cart);
}
return(RedirectToAction("Index", "Cart"));
}
//Allows customer to add a dish to his cart
public ActionResult AddToCart(int id)
{
//We retrieve the dishe's price
DishesManager dManager = new DishesManager(Configuration);
Dishes dishe = new Dishes();
int price = dManager.GetDishePrice(id);
//We add the price to the total amount, we initiate the session value if it is the first dish of the cart.
if (HttpContext.Session.GetInt32("TotalAmount") != null)
{
HttpContext.Session.SetInt32("TotalAmount", (price + (int)HttpContext.Session.GetInt32("TotalAmount")));
}
else
{
HttpContext.Session.SetInt32("TotalAmount", price);
}
//So if it is the first dish to be added we create a list of item(Dishe+quantity) in the session
if (SessionHelper.GetObjectFromJson <List <Item> >(HttpContext.Session, "cart") == null)
{
List <Item> cart = new List <Item>();
cart.Add(new Item {
Dishe = dManager.GetDishe(id), Quantity = 1
});
SessionHelper.SetObjectAsJson(HttpContext.Session, "cart", cart);
}
else
{ /*Else if the list is already created we get it and check if the dish is already in the list.
* If yes we increment the quantity, else we add the dish as a new item.
*/
List <Item> cart = SessionHelper.GetObjectFromJson <List <Item> >(HttpContext.Session, "cart");
int index = DoesExist(id);
if (index != -1)
{
cart[index].Quantity++;
}
else
{
cart.Add(new Item {
Dishe = dManager.GetDishe(id), Quantity = 1
});
}
SessionHelper.SetObjectAsJson(HttpContext.Session, "cart", cart);
}
//Redirect to the cart
return(RedirectToAction("Index", "Cart"));
}